/******************************************************************************
 * Spine Runtimes Software License v2.5
 *
 * Copyright (c) 2013-2016, Esoteric Software
 * All rights reserved.
 *
 * You are granted a perpetual, non-exclusive, non-sublicensable, and
 * non-transferable license to use, install, execute, and perform the Spine
 * Runtimes software and derivative works solely for personal or internal
 * use. Without the written permission of Esoteric Software (see Section 2 of
 * the Spine Software License Agreement), you may not (a) modify, translate,
 * adapt, or develop new applications using the Spine Runtimes or otherwise
 * create derivative works or improvements of the Spine Runtimes or (b) remove,
 * delete, alter, or obscure any trademarks or any copyright, trademark, patent,
 * or other intellectual property or proprietary rights notices on or in the
 * Software, including any copy thereof. Redistributions in binary or source
 * form must include this license and terms.
 *
 * THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL ESOTERIC SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS INTERRUPTION, OR LOSS OF
 * USE, DATA, OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/
part of spine_flutter;

abstract class AssetLoader<T> implements Function {
  Future<MapEntry<String, T>> call(String path);
}

class TextureLoader extends AssetLoader<Texture> {
  @override
  Future<MapEntry<String, Texture>> call(String path) async {
    final ByteData data = await rootBundle.load(path);
    if (data == null) throw StateError('Couldn\'t load texture $path');
    final ui.Codec codec =
        await ui.instantiateImageCodec(data.buffer.asUint8List());
    final ui.FrameInfo frame = await codec.getNextFrame();
    return new MapEntry<String, Texture>(path, new Texture(frame.image));
  }
}

class TextLoader extends AssetLoader<String> {
  @override
  Future<MapEntry<String, String>> call(String path) async {
    final String data = await rootBundle.loadString(path);
    if (data == null) throw StateError('Couldn\'t load texture $path');
    return new MapEntry<String, String>(path, data);
  }
}

class JsonLoader extends AssetLoader<dynamic> {
  @override
  Future<MapEntry<String, dynamic>> call(String path) async {
    final String data = await rootBundle.loadString(path);
    if (data == null) throw StateError('Couldn\'t load texture $path');
    return new MapEntry<String, dynamic>(path, json.decode(data));
  }
}
